I was having some challenging times with filament passing through the original adapter, so I designed my own adapter with little to no filament friction! I’m very happy with the outcome and can’t wait to start printing. I disabled the wipe tower and have attached a brush at the end of the x axis so I can wipe the nozzle after it purges the next color off the build plate.
https://share.icloud.com/photos/0ffarCOLvS4uhmYhCQs54TZxA
I've found that loosening the screw on the Y adapter by just a smidgen helps take some of the pressure off, let the filament flow better. If that helps any. Either way I'm excited to see your take, got a printables or thingiverse link? The icloud link is dead